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Finding the Fourth Proportional to 30,965.79, 46,369.80 and 20,403.80

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Solution

The fourth proportional to 30,965.79, 46,369.80 and 20,403.80 is: 30,553.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.79 : 46,369.80 = 20,403.80 : x
  2. Step 2: Convert to fraction form
    30,965.79/46,369.80 = 20,403.80/x
  3. Step 3: Cross multiply
    30,965.79x = 46,369.80 × 20,403.80
  4. Step 4: Simplify right side
    30,965.79x = 946,120,067.28
  5. Step 5: Solve for x
    x = 946,120,067.28/30,965.79
  6. Step 6: Final answer
    x = 30,553.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.